From my own purchase directly from Dyson. Not sure it’s ever been used, we only use 2 attachments and the rest have been hanging out in the closet.

Stubborn dirt brush

Stiff nylon bristles dislodge ground-in dirt from coarse carpets, high traffic areas and car interiors.

Engineered to fit Dyson Gen5detect™, Gen5outsize™, V15™, V12™, V11™, V10™, V8™, and V7™ vacuums​.

Removes dried-on mud and dirt

Stiff nylon bristles help scrub dried-on dirt from high traffic areas. With a wide mouth to cover more surface with each sweep.

Compatible machines

Dyson Gen5detect™ vacuums

Dyson Gen5outsize™ vacuums

Dyson V15™ vacuums

Dyson V12™ vacuums

Dyson V11™ vacuums

Dyson Cyclone V10™ vacuums

Dyson V8™ vacuums

Dyson V7™ vacuums